12443340 has 192 divisors, whose sum is σ = 44706816. Its totient is φ = 2515968.

The previous prime is 12443339. The next prime is 12443341. The reversal of 12443340 is 4334421.

It is an interprime number because it is at equal distance from previous prime (12443339) and next prime (12443341).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 234754 + ... + 234806.

It is an arithmetic number, because the mean of its divisors is an integer number (232848).

Almost surely, 2^12443340 is an apocalyptic number.

12443340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12443340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22353408).

12443340 is an abundant number, since it is smaller than the sum of its proper divisors (32263476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12443340 is a wasteful number, since it uses less digits than its factorization.

12443340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 12443340 is about 3527.5118709935. The cubic root of 12443340 is about 231.7282539593.

Adding to 12443340 its reverse (4334421), we get a palindrome (16777761).

The spelling of 12443340 in words is "twelve million, four hundred forty-three thousand, three hundred forty".